KLAC vs UCTT: Correlation
Measured on weekly returns over the past three years, KLA Corporation (KLAC) and Ultra Clean Holdings, Inc. (UCTT) carry a correlation of 0.77, a strong link.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are KLAC and UCTT?
Across a 3-year window, the weekly returns of KLAC and UCTT correlate at 0.77, strong. The relationship has been stable: the 1-year correlation (0.85) sits close to the 3-year figure. Stretching to 5 years gives 0.78, with an annualized covariance of 2199.3 %².
Within KLAC's tracked universe of 40 assets, UCTT comes in at #9 by 3-year correlation. Correlation aside, the last 12 months split them widely, with UCTT ahead by 103.7 points (+107.9% versus +211.6%).
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
KLAC vs UCTT: side by side
| KLAC (KLA Corporation) | UCTT (Ultra Clean Holdings, Inc.) | |
|---|---|---|
| 1-year return | +107.9% | +211.6% |
| 5-year return | +463.9% | +57.9% |
| Volatility (ann.) | 45.6% | 62.8% |
| Beta vs S&P 500 | 1.84 | 2.28 |
| Max drawdown (3Y) | -43.6% | -68.2% |
| Market cap | $240.1B | $3.4B |
| P/E (trailing) | 50.2 | – |
| Dividend yield | 0.44% | 0.00% |
| Sector / category | Information Technology | US Listed |
Year-by-year returns
| Year | KLAC | UCTT |
|---|---|---|
| 2022 | -11.2% | -42.2% |
| 2023 | +56.0% | +3.0% |
| 2024 | +9.4% | +5.3% |
| 2025 | +94.5% | -29.5% |
| 2026 | +51.8% | +195.1% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are KLAC and UCTT good diversifiers for each other?
To a limited degree. At 0.77 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
FAQ
What is the correlation between KLAC and UCTT?
As of 2026-08-27, the correlation of weekly returns between KLAC and UCTT is 0.77 over 3 years, 0.85 over 1 year and 0.78 over 5 years.
Is UCTT a good diversifier for KLAC?
To a limited degree. At 0.77 the two still catch most of the same waves, so the pair smooths returns a little without insulating either from a shared selloff.
What does a correlation of 0.77 mean?
On the −1 to +1 scale, 0.77 describes how much the two returns move together: +1 is lockstep, 0 is independence, negative values mean opposite directions. It says nothing about which performed better.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/klac-vs-uctt.json
Markdown for the live badge, attribution link included:
[](https://www.pairbook.io/pair/klac-vs-uctt/)
Free with attribution; caching and terms are described in the API documentation.
Related comparisons
Hubs: KLAC correlations · UCTT correlations
